Graco 15D126 0.156 Diameter Shaft U-Cup Seal

Graco 15D126 U‑Cup Seal (0.156″ Shaft)

The Graco 15D126 U‑Cup Seal is a high-precision sealing component engineered for shafts with a 0.156″ diameter, commonly found in Graco texture spray guns. Its rugged design helps maintain leak‑free performance even during repeated trigger action.

Key Features

• U‑cup profile provides effective dynamic sealing under motion
• Specifically sized for 0.156″ (3.96 mm) shafts
• Made from durable elastomer material that resists wear
• OEM-grade replacement ensures precise compatibility
• Reduces fluid bypass and ensures consistent spray performance

Technical Specifications

Durability & Performance

The U‑cup geometry creates a strong sealing lip that stays in contact with the shaft even when the gun is actuated repeatedly. This helps prevent leakage, backflow, and pressure loss, making it ideal for high-frequency or high-pressure applications.

Applications & Compatibility

This seal is specifically referenced in Graco parts documentation for certain TexSpray / texture guns, particularly models using the 0.156″ diameter fluid‑needle shaft.

• Graco TexSpray / texture gun model 248091 (non‑bleeder) 
• Graco TexSpray / texture gun model 248093 / 248094 (bleeder-style) parts list includes 15D126

Installation & Maintenance

• Thoroughly clean the shaft before installing the seal.
• Lubricate the lip with a compatible grease or fluid to avoid initial wear.
• Ensure the U‑cup’s sealing lip faces the pressure side for correct orientation.
• Check periodically for lip wear or deformation; replace if leakage begins.
• Use non-metal tools for installation to avoid damaging the seal material.

Frequently Asked Questions